Spill containment system trough unit with weir flange



FIG. 1 is a top perspective view of a spill containment system trough unit with weir flange, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof; and

FIG. 5 is a rear elevation view thereof. 

The ornamental design for a spill containment system trough unit with weir flange, as shown. 